Bag



FIG. 1 is a rear perspective view of a bag showing my new design;

FIG. 2 is a rear view thereof; and,

FIG. 3 is another rear perspective view thereof.

The even-length broken lines within the shaded area represent stitching that forms no part of the claimed design. The uneven-length broken lines depicting the remainder of the bag form no part of the claimed design. 

CLAIM The ornamental design for a bag, as shown and described. 